New species ofEpacanthion(Nematoda: Thoracostomopsidae) from Patagonia coast, Río Negro and Chubut, Argentina

Two new free-living marine nematodes belonging to the family Thoracostomopsidae, subfamily Enoplolaiminae and the generaEpacanthionare described from Patagonian coastal areas, Río Negro and Chubut provinces of Argentina. InEpacanthion bicuspidatumsp. nov. the main features are: two cusps on distal mandible end; presence of two rings of eight setae in the cervical region; and eight crown-shaped setae along the body, presence of one supplement distant two cloacal body diameter (cbd) from cloacae, gubernaculum and short spicule.Epacanthion ampullatumsp. nov. is characterized by having a tubular and long pre-cloacal supplement, short spicule, presence of gubernaculum, presence of three long setae on the tip of the tail, the presence of one supplement distant three cbd from cloacae and the presence of two small cusps on the distal end of the mandible.

Capillaria margolisi sp.nov. (Nematoda: Capillariidae) from a marine fish, Scorpaenichthys marmoratus (Ayres), from the west coast of Canada

A new nematode species, Capillaria margolisi sp.nov., is described from the pyloric caeca of cabezon, Scorpaenichthys marmoratus (family Cottidae), from the west coast of Canada (Vancouver Island). It can be distinguished from other congeneric species possessing a spiny spicular sheath mainly by the short spicule (0.2 mm) and by the presence of two large sublateral lobes on the male tail. This species differs from all other members of Capillaria from fishes, except C. gracile and C. rhinobati, in having a bell-shaped vulvar appendage in the female.